Mappings with gdbserver

[Robert Schwebel]

I currently try to visualize a piece of memory mapped I/O with gdbserver
and ddd; to get a user space pointer to the device memory I've mmap()ed
the address space and set a breakpoint afterwards, then started this
program with gdbserver. 

The problem is that the ddd display does only show FFs and when I try to
write to the addresses I get "cannot access memory". Copying the area
behind my pointer to somewhere else from the program I see the correct
content. This lets me assume that the memory mapping gdbserver sees is
different than what the program-under-test sees. 

Can anybody give me a hint how I could visualize and manipulate a piece
of "physical" memory with ddd? 

Robert
-- 
 Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de
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